Top roll for spinning-machines.



No. 840,010. PATENTED JAN. I, 1907.

` W. G. RAGSDALB. y

TOP ROLL FUR SPINNING MACHINES.

APPLIOATION FILED MAY 2, 190e.

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' Toa/ZZ wlpom t may concern.-

UNITED sTATEs PATENT oEEIoE.

WILLIAM G. RAGSDALE, OF JAMESTOWN, NORTH CAROLINA. ToP ROLL Fon SPINNING-MACHINES.

Specification of Letters Patent.

Patented Jan. 1, 11907.

Application led May Z, 1906. Serial No. 314,822.

Be it known that I, WILLIAM G. RAGsDALE, a citizen of the United States, residing in Jamestown, in the county of Guilford and State of North Carolina, have invented certain new and useful Improvements in Top Rolls for Spinning-Machines, of which the following is a specification.

My invention relates to certain improvements in what are called to rolls employed in spinning frames, mu es, Speeders, drawing-frames, and other like machinery; and the object of my invention is to provide a top roll which will not require the use of a lubricating-oil, but will run freely with a minimum amount of friction, will adjust itself to irregularities in the formation of the roll, and may be easily assembled, taken apart., or adjusted.

en oil is used to lubricate the rolls, there is danger of the leather or rubber covering usually employed becoming injured by the creeping of oil from the bearings to the surface of the roll, and it also sometimes happens that the cotton or yarn passing between the rolls is made to adhere thereto by the escaped oil. By employing ball or roller bearings the use of oil can be dispensed with and yetfriction can be reduced to aminimum, so as to allow the roll to run with perfect freedom and without injury. In applying ball-bearings to top rolls it is desirable that the construction of the bearing shall be as simple as possible consistent with efficiency, that proper adjustments shall be provided for, and that the parts may be easily assembled or taken apart. It is also desirable that the rolls shall be capable of adjusting themselves to compensate for any irregularities in their coverings in order that the top rolls may grip their companion luted rolls throughout the entire length of the top-roll coverings` All of these advantages are present in my improved ball-bearing top roll, which is illustrated in the accompanyingpdrawings, in whichigure 1 shows a front elevation of a pair of fluted rolls and their companion top rolls with my improvements applied. Fig. 2 shows a longitudinal central section through a pair of my improved top rolls. Fig. 3 shows in section some ofthe parts of the top roll detached from the other parts. Fi 4 shows a longitudinal section of one modification, while Fig. 5 is a similar view of another modification. Fig.l 6 shows'how a top roll having a coveringl of uneven thickness will adjust itself relatively to a iiuted roll, so that the c overing may grip the iiuted roll from end to end.

In Fig. 1 I have shown a pair of top rolls A arranged parallel with a palr of iiuted rolls B in the usual way. The frame in which the top rolls are sup orted is 'indicated at C, and the usual saddlpe is indicated at D. The

-arbor E is formed= with a central portion e to receive the saddle, and it has at each end a sorew-threaded spindle e of reduced diameter, connected with the central portion of the arbor by a tapered shoulder e2. The shells F may be covered with rubber, leather, or other suitable material j', as usual. Prefer-l ably the shells are formed with fine threads, as shown, and the covering is screwed on in such manner as to iit Vclosely and tightly without any liability of slipping endwise or turning on the shell. Each shell is formed on its inner side midway between its ends with an annular groove g to receive balls or rollers G, which bear on the tapered shoulders e2 and are held in contact therewith by sleeve-nuts H, the inner ends 7L of which are tapered correspondingly with the tapered shoulders. curved Walls, as shown in Fig. 2, with flat, inclined, or V-shaped walls, as illustrated in 4, or I may make the roove rectan- I may form the groove g withl F1 gular -in cross-section, as indicated in Fig.

5. The shoulders e2 and the tapered ends z may have flat inclined surfaces, as shown in Fig. 2, or they may be curved, as illustrated 1n Fig. 4.

The nuts H screw onto the spindles e', and the balls are contained in the channels formed by the grooves g and the spaces between the ends h of the nuts and the shoulders e2. The nutsare somewhat longer than the spindles, providing journals h', and when screwed home leave spaces to receive tightening-screws I. When inserted, these screws bear firmly against the ends of the spindles and look the, nuts and spindles securely together. When the parts-are assembled, as indicated in Fig. 2, the shells are free to revolve about the arbor and spindles with a minimum amount of friction. The nuts may be adjusted to any desired extent and firmly locked t'o prevent the balls being dislodged, while permitting them to have perfeet freedom of movement.

The construction shown provides for a slight rocking movement which compen- IOO sates for any irregularity in the thickness of the covering Sometimes this covering is not exactly even, and so the top roll will not always bear evenly on the fluted roll; but by providing the rocking movement referred to these irregularities are compensated for. I have illustrated this feature of my invention in Fig. 6, where it will be observed that the covering f is made of different thickness, The -drawings exaggerate somewhat this irregularity merely for clearness of illustration; but where any such irregularity occurs in the thickness of the covering the roll will rock sulliciently to allow its covering to bear against the iuted or channeled roll from end to end.

rIhe drawings show the spaces between the nuts, arbor, and shells somewhat greater than in practice. This also is done in order to more clearly illustrate the construction. Ordinarily the bore of the shells is such as to provide very little space between the inner walls of the shells and the arbor and nuts, but su'llicient to allow a very slight rocking movement to compensate for the irregularities in the covering before referred to.

Fig. 3 shows some ofthe parts separated, and by inspection of this figure it will be seen how easily' the parts may be assembled or taken apart. In assembling the shell is first passed onto the spindle, balls are dro ped in, as indicated, the spindle and arbor tillen being held vertically, and then the nut II is screwed home and the tightening-screw I applied. When the proper adjustment is made, the balls will be located as illustrated in Fig. 2. When thus assembled, the shells will be able to freely revolve and will have a slight rocking movement. The shells are of extremely simple construction and may be of any diameter. The construction shown rovides a very simple way of holding the s ells in place, preventing endwise movement thereof, and yet rovides an antifrictionbearing, giving per ect freedom of movement.

I claim as my invention- 1. A ltop roll, comprising an arbor having a threaded spindle at one end and formed with va tapered shoulder at the inner end of the s indle, a nut screwing onto the spindle and aviniT a tapered inner end, a shell formed witIi an annular 'groove on its inner l side intermediate its ends and balls interposed directly between the shoulder and the tapered end of the nut and entering the groove of the shell,

2. A top roll, comprising an arbor having a spindle of reduced dia-meter -on one end, a tapered shoulder between the spindle and the central portion of the arbor, a nut having a tapered inner end arranged on the spindle, balls interposed directly between the end of the nut and the shoulder of the arbor, and a roller-shell having an annular groove arranged midway between its ends and receiving the balls and which fits the arbor and nut loosely' so as to provide a slight rocking movement on the balls.

3. A top roll, comprising an arbor having a threaded spindle at one end, and formed with a tapered shoulder at the inner end of the spindle, a nut screwing onto the spindle and having a tapered inner end, a locking-screw entering the nut and engaging the outer end of the spindle, a shell formed with an annular groove intermediate its ends and balls in the groove interposed directly between the shoulder and the tapered end of the nut.I

4. A top roll, comprising an arbor having a central portion formed to receive a saddle and having threaded spindles at opposite ends, a tapered shoulder at the inner end of eac-h spindle, a nut screwing onto each spindle and having a tapered inner end, a screw locking each spindle to its nut, and a shell at each end of the arbor formed with an annular groove intermediate its ends and balls in the groove interposed directly between the shoulders and the tapered ends of the nuts.

5. A top roll comprising a shell having an annular groove midway between its ends on the inside, 4an arbor or support for the shell having a groove coinciding with the groove in the shell and balls arranged in the groove of the arbor and the shell for preventing endwise movement of the shell and allowing a slight rockin T movement thereof while permitting the s ell to revolve about the arbor with a minimum amount of friction.

6. A top roll, comprising an arbor formed with threaded spindles at opposite ends, and with shoulders at the inner ends-of the spindles, nuts screwing onto thespindles and having tapered inner ends and outer-ends formed to provide journals for the roll, roller-shells formed with ball-receiving grooves intermediate their ends, and balls in the grooves interposed directly between the inner ends of the nuts and the tapered shoulders.

In testimony whereof I have hereunto subscribed my name.

wiLLiAM e. RAGSDALE.

Witnesses J. S. SPENCER, .MAMIE GARDNER. 

